Dietary Supplement 7 mg Zeaxanthin Natural Antioxidant for Eye Health Purity & Potency Guaranteed Natural Factors uses LuteinRich - a naturally-sourced, pure, high potency lutein and zeaxanthin derived from marigold petals. LuteinRich is non-irradiated and GMO-free. Manufactured by Natural Factors to ensure safety and potency in accordance with Good Manufacturing Practices (GMP) of the FDA and Health Canada.